ENVIRSC 2EI3 Lecture 3: Enviro Issues Lec 3 Ecosystems and Biodiversity
6 Feb 2017
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Document Summary
Ecosystems and biodiversity: energy flow in ecosystems and biodiversity of heat. There is always a loss of energy from one trophic level to the next, in the form. When everything dies, consumers decompose the organism to create. A loss of biodiversity in a marine environment limits the food sources that biomaterials. organisms can get their energy from, and limits energy and nutrient flow to higher trophic levels. our land fairly recently. Endemic species: species that are found nowhere else on earth. In canada, 1-5% of species are endemic because of the glaciers that covered. The vancouver island marmot is the only endangered species in canada. In australia, 68% of species are endemic. Canada"s record on protecting biodiversity: in 2006, provinces and territories put in place an outcome-based plan, but tracking and assessing the state of biodiversity is easier said than done: alien and invasive species. Biodiversity in canada: 140, 000 species, most of which are insects.
